Phi-3 Medium 128K
Advancing the state-of-the-art in AI and computing.
Cheapest of 2 routes · Microsoft Foundry
About
The Phi-3 Medium 128K is an open-source, 14-billion parameter language model by Microsoft, designed for efficient operation in resource-limited environments. Noted for its state-of-the-art performance on reasoning tasks, it excels in language understanding, code generation, and logical reasoning while offering a long context window of up to 128,000 tokens, making it ideal for applications like summarizing lengthy documents. Its dense decoder-only Transformer architecture has been refined with supervised fine-tuning and preference optimization to enhance instruction-following capabilities. Additionally, Phi-3 Medium 128K is optimized for diverse hardware platforms, ensuring broad accessibility and performance 12.
Top use-case fit: coding, agents, and build tasks
Coding
Q/$ CClassification
Q/$ DProvider price ladder
Compare all 2Compare API pricing across 2 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| Microsoft Foundry | $0.500 | $1.50 | ServerlessProvisioned |
| NVIDIA NIM | - | - | ProvisionedPartial |
Available via routers & gateways(6)
LiteLLM
GatewayOpen-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.
Portkey
GatewayProduction AI gateway routing to 1,600+ LLMs with failover, load balancing, semantic caching, and guardrails; Apache 2.0 core is fully self-hostable with the complete feature set.
Azure AI Foundry Model Router
RouterMicrosoft Azure AI Foundry's native model router that uses a trained ML model to route each prompt in real time to the optimal Azure-hosted model, with Balanced/Cost/Quality mode selection and automatic failover.
Helicone
GatewayObservability-first AI gateway with routing, caching, rate limiting, and request tracing; Apache 2.0 open-source core with a managed hosted tier for logging and analytics.
Kong AI Gateway
GatewayMulti-LLM AI gateway built on Kong Gateway 3.x, adding semantic routing, load balancing, guardrails, and MCP traffic analytics as plugins over Kong's existing API management platform.
NVIDIA LLM Router Blueprint
RouterNVIDIA's open-source AI blueprint for LLM routing that selects the optimal model per prompt via intent classification or neural auto-routing; being deprecated 2026-06-20.
Capabilities
No model capability flags are currently sourced.
Benchmark peer barsfor Coding
Benchmark scores(3)
Migration checks
No linked migration route is available for this model yet.
Compare Phi-3 Medium 128K with other models
Comparison and alternatives
Browse all comparisons →Advancing the state-of-the-art in AI and computing.
Cheapest of 2 routes · Microsoft Foundry